of the intrinsic differences that separate amarican from english the chief have their roots in the obvious disparity between the environment and traditions of the american people since the seventeenth century and those of the english.
参考答案:
本句正常语序为:the chief of the intrinsic differences that separate amarican from english have their roots in the obvious disparity between the environment and traditionsof the american people and those of the english since the seventeenth century.
"that separate amarican from english" 做定语从句,"since the seventeenth century" 为时间状语,这两处译成单句,使译文通顺,易于理解。